¹³C NMR Investigations of Fullerene Black

Solid-state 13C NMR measurements on differently treated fullerene black samples are reported. The results show that no significant amounts of C60 molecules are entrapped in fullerene black in a way that they are not accessible for conventionally used toluene extraction. The broad distribution of chemical shifts in the 13C MAS NMR spectra confirms the large abundance of bent carbon structures in this amorphous carbon material